Internal-combustion engine



R. T. OSMAN. INTERNAL COMBUSTION ENGINE.

APPLICATION FILED NOV. 9, 1920.

PatentedSepfi. 13,1921.

' @jwow /m Ralph T- P?"- UNITED STATES:

FAT'ENT OFFICE.

mun. r. osmm, or AsnLANi), WISCONSIN. assronoa orbits-HALF '1'0 ELLIOTTw. ermine, or ASHLAND. WISCONSIN.

INTERNAL-CQMBUSTION ENGINE.

specification of Letters Patent. Patented Sept. 13 1921.

Application filed November 9, 1920. Serial No. 422,859.

To all whom it may concern:

Be it known that I, RALPH T. Osman, a citizen of the United States, andresident of Ashland, in the county of Ashland and State of Wisconsin,have invented certain new and useful Improvements in Internal-Combustion Engines; and I do hereby declare that the following is afull, clear, and exact description thereof.

My invention relates to engines of theinternal combustion type, and moreespecially to one wherein the head is stationary and the cylinderrotates on its longitudinal axis while the piston reciprocates.

An engine of the type described is illustrated in my copendingapplication, Serial No. 366,377, filed March 16, 1920, and the presentinvention is an improvement on the device'illustra'ted in saidapplication.

. An important object of my invention is to form and maintain a tightfitting connection between the cylinder and its head, particularlyaround the inlet and outlet ports in order to prevent any possibleleakage of gases around the same.

Another object is to hold the cylinder yieldingly on its seat and toautomatically relieve the strain on the engine when through overheatingor improper lubrication, there may be a'tendency to bind or stick.

My invention also comprises novel details of improvement andcombinations of parts as will be more fully hereinafter set forth andthen pointed out in the claims.

In describing the structure of my inven tion, reference will be had tothe accompanying drawing, in which the single figure is a sectionthrough one of the cylinders, parts being shown in elevation in order tobetter illustrate the structure thereof.

In my former application referred to, I have shown the revolvingcylinder as having a straight bearing in the stationary head, and it hasbeen found that due to wearing of the parts, there is a slight tendencytoward a leakage or loss of compression. In order to overcome thisdisadvantage, the present invention has been designed in which thestationary head 1 is provided with a tapered bearing surface 17 in whichis mounted the tapered or frusto conical end of the rotating cylinder16, thelower end of which has a bearing in the housing 15 that iscarried and supported by the connecting ribs 10. Loosely mounted on thelower end of the rotating cylinder and supported by the housing 15 is adriven gear 18, rovided with a depending flange 19, in w ich are formedthe inclined slots 20, adapted to receive the pins 21, carried by thecylinder and projecting into the slots. Disposed between the pins 21 andthe lower ends of the slots are springs 22 that normally urge the pinsupwardly upon the inclined surfaces of the slots 20, thereby causing thetapered end of the cylinder to be held upon its seat or bearing in thehead- 1. Surrounding the cylinder 16 above the gear 18 is a wear washer23, held in place by the'retaining member 24, that is secured in anysuitable manner to the housing 15. Thus it will be seen that the gear 18is rotatably held in the housing, whereby should a bind or. stickingoccur between the cylinder and its bearing, the tension of the springs22 will be overcome, allowing the pins to travel downwardly in the slots20, which will tend to withdraw the cylinder from its seat or bearing,until the bind is relieved, when the springs will again force it uponits seat.

The lower ends of the connecting ribs 10 are provided with bearings 11and 12, in which is journaled a crank shaft 13, having the usual crank14, on which is mounted the connecting rod of the reciprocating piston28 which is of the usual type except that the end thereof is tapered asat 28' so as to conform to the taper of the cylinder, thereby reducingthe space of the compression chamher to the desired size. F or drivingthe gear 18 in timed relation to the crank shaft, a driving pinion 25 ismounted within the housing upon the shaft 26, which in turn is driven bythe crank shaft through the beveled gears 27.

The tapered end of the cylinder that forms the compression chamber isprovided with ports 29, which as the cylinder rotates, register in turnwith the inlet and outlet ports 30 leading to the ca-rbureter andexhaust.

From the foregoing, it will be seen that a very simple and eflicientmethod has been devised for effecting a tight fitting bearing connectionbetween the cylinder and its head, while at the same time the danger ofexcessive strain or stress upon the motor, due to a possible bindbetween the cylinder and its bearings, is eliminated.

While I have shown and described a specific method of carrying out myinvention, it

is well understood that various changes in structural details might bemade within the scope of the appended claims.

1. In an engine of the characterdescribed, a head provided with atapered bearing, a cylinder journaled in said bearing, means forrotating one of said members and a yieldable connection between saidmeans and said rotated member, said connection including a cam forurging the cylinder into said tapered bearing.

.Which said cylinder is mounted, one of said bearings being tapered, aring gear sur rounding said cylinder, means for driving said ring gear,and means includingyieldable connections between said ring gear and saidcylinder for urging said cylinder into close relation with said taperedbearing.

4. An internal combustion engine comprising a rotatable cylinder, apiston reciprocable in said cylinder, a crank shaft for driving saidpiston, bearings in which said cylinder is mounted, one of said bearingsbeing tapered, a ring gear surrounding said cylinder, means for drivingsaid ring gear in timed relation with said crank shaft and meansincluding yieldable connections bev tween said ring gear and saidcylinder for urging the cylinder into close relation with said taperedbearing.

5.- An internal combustion engine comprising a rotatable cylinder,bearings in which said cylinder is mounted one of said bearings beingtapered, a ring gear surrounding said cylinder, means for driving saidring gear, yieldable means connected with said ring gear for rotatingsaid cylinder and means cooperating with said yieldable means for urgingthe cylinder into close relation with said tapered bearing.

6. An internal combustion engine comprising a rotatable cylinder, apiston reciprocable in said cylinder, a crank-shaft for driving saidpiston, bearings in which said cylinder is mounted, one of'said bearingsbeing tapered, a ring gear surrounding said cylinder, means for drivingsaid ring gear in timed relation with said crank shaft, yieldable meansconnected with said ring gear for rotating said cylinder and meanscooperating with said yieldable means for urging the cylinder into closerelation with said tapered bearing.

7. An internal combustion engine comprising a rotatable cylinder,bearings in which said cylinder is mounted, one of said bearings beingtapered, a ring gear surrounding said cylinder, means for driving saidring gear, inclined slots in said ring gear, pins mounted on saidcylinder and projecting into said slots, springs in said slots bearingagainst said pins whereby said cylinder is roated with said ring gearand simultaneously urged in the direction of the tapered bearing.

8. An internal combustion engine comprising a rotatable cylinder, apiston reciprocable in said cylinder, a crank shaft for driving saidpiston, in which said cylinder is mounted, one of said bearings beingtapered, a ring gear surrounding said cylinder, means for driving saidring gear in times relation with said crank shaft, inclined slots insaid ring gear, pins mounted on said cylinder and projecting into saidslots, and springs in said slots bearing against said pins whereby saidcylinder is rotated with said ring gear and simultaneously urged in thedirection of the tapered hearing.

In testimony that I claim the foregoing I have hereunto set my hand atAshland, in the county of Ashland and State of Wisconsm.

RALPH T. OSMAN.

